佛罗里达大学Brent S. Sumerlin教授学术报告

报告题目：Exploiting light to push the limits of controlled radical polymerization and macromolecular metamorphosis

报告人：Dr. Brent S. Sumerlin

Associate editor of ACS Macro Letters

Butler Polymer Research Laboratory, Center for Macromolecular Science & Engineering, Department of Chemistry, University of Florida, Gainesville, FL 32611-7200

主持人：陈永明  教授

时间：2018年3月7日（星期三）下午16：00

地点：丰盛堂芙兰学术交流中心A403

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摘要：

 Relying solely on mild ultraviolet irradiation of thiocarbonylthio compounds in the presence of vinyl monomers, a new avenue to well-defined ultrahigh molecular weight (UHMW) polymers has been developed. Through the use of aqueous conditions, well-controlled polymers with high molecular weights that are unprecedented for controlled radical polymerizations have been achieved. This photomediated polymerization approach reaches number-average molecular weights in excess of 8.00 ´ 106 g/mol with degrees of polymerization above 85,000, making these, to our knowledge, the highest molecular weight polymers ever achieved via reversible-deactivation radical polymerization. In many cases, well-defined UHMW polymers can be obtained in minutes. The utility of the technique is further demonstrated through the synthesis of block copolymers, enabling access to a new field of well-defined UHMW materials and polymers that can undergo dramatic transformations in their topology via a process we call “macromolecular metamorphosis.”